Adjustable cooler insert



FIG. 1 is a front perspective view of the adjustable cooler insert in a slidably adjusted position;

FIG. 2 is a top view of the insert;

FIG. 3 is a bottom view of the insert;

FIG. 4 is a left side view of the insert;

FIG. 5 is a right side view of the insert;

FIG. 6 is a front side view of the insert; and,

FIG. 7 is a back side view of the insert.

The broken lines in the drawing depict drainage openings, leg attachment features and indicia bearing medallions that form no part of the claimed design. 

CLAIM The ornamental design for an adjustable cooler insert, as shown and described. 